Milliard Super Strong Premium Metal Bed Frame with Double Rail Center Support for Maximum Weight Capacity with Wheels - King Overbuilt frame construction provides superior support and resists bending or breaking to accommodate big and tall mattresses. Frame members interlock with sliding sockets for easy, but secure assembly without tools. Recessed edges and end caps minimize accidents and maximize safety. Extra-wide reinforced headboard brackets are designed to fit headboards of almost any kind. One Piece Steel Cross rails Will Never Separate.